package database.service;

import java.util.Iterator;

import po.BookPO;

public interface BookDataService {
	
	public void load();
	public void save();
	
	public Iterator<BookPO> getIterator();
	
	public int insert(BookPO book);
	public void delete(BookPO book);
	public void update(BookPO book);
	public BookPO find(int id);

}
